Cita APA (7th ed.)

Keller, P. A. (2005). Six sigma demystified. McGraw-Hill.

Cita Chicago (17th ed.)

Keller, Paul A. Six Sigma Demystified. New York: McGraw-Hill, 2005.

Cita MLA (8th ed.)

Keller, Paul A. Six Sigma Demystified. McGraw-Hill, 2005.